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首页> 外文期刊>ISIJ international >Reactivity of Coke Ash on Alumina-Carbon Blast Furnace Hearth Refractories
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Reactivity of Coke Ash on Alumina-Carbon Blast Furnace Hearth Refractories

机译:焦炭在氧化铝-碳高炉炉膛耐火材料上的反应性

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摘要

Understanding the degradation of blast furnace hearth refractories by coke ash products is a crucial component in achieving long furnace life. This study has been conducted to determine the reactivity of calcium aluminates (CaO·Al_2O_3, CaO·2Al_2O_3 and CaO·6Al_2O_3) in contact with an alumina-carbon refractory at representative hearth temperatures of 1450° to 1550℃. The rate of reaction between the alumina-carbon refractory and calcium aluminates was observed to increase with CaO content. The largest reaction layer was observed in CaO·Al_2O_3 followed by CaO·2Al_2O_3 and CaO·6Al_2O_3. The calcium aluminate (CaO·Al_2O_3, CaO·2Al_2O_3) and alumina-carbon reactions observed in this study were found to be consistent with the logarithmic rate law, with the exception of CaO·6Al_2O_3 where no reaction was observed. Energy dispersive spectroscopy analysis indicated the formation of CaO·2Al_2O_3,CaO·6Al_2O_3, corundum (Al_2O_3), plagioclase (CaO·Al_2O_3·2SiO_2) and melilite (2CaO·Al_2O_3·SiO_2) at the reaction interface of the reaction couples. The large volume changes due to the formation of these phases may result in spalling at the hot face of the hearth refractory.
机译:了解焦炭产品对高炉炉膛耐火材料的降解是实现长炉寿命的重要组成部分。本研究旨在确定在1450°至1550℃的典型炉膛温度下,铝酸钙(CaO·Al_2O_3,CaO·2Al_2O_3和CaO·6Al_2O_3)与氧化铝-碳质耐火材料接触的反应性。观察到氧化铝-碳质耐火材料与铝酸钙之间的反应速率随CaO含量的增加而增加。在CaO·Al_2O_3中观察到最大的反应层,其次是CaO·2Al_2O_3和CaO·6Al_2O_3。本研究中观察到的铝酸钙(CaO·Al_2O_3,CaO·2Al_2O_3)和氧化铝-碳反应与对数速率定律一致,但CaO·6Al_2O_3除外,未观察到反应。能量色散光谱分析表明,CaO·2Al_2O_3,CaO·6Al_2O_3,刚玉(Al_2O_3),斜长石(CaO·Al_2O_3·2SiO_2)和硅沸石(2CaO·Al_2O_3·SiO_2)的形成。由于这些相的形成而导致的大体积变化可能导致炉膛耐火材料的热面剥落。

著录项

  • 来源
    《ISIJ international》 |2015年第9期|1849-1858|共10页
  • 作者单位

    PYROmetallurgical Group, School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522 Australia;

    PYROmetallurgical Group, School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522 Australia;

    Ironmaking Technology, BlueScope, PO Box 1854, Wollongong, NSW 2505 Australia;

    PYROmetallurgical Group, School of Mechanical, Materials and Mechatronics Engineering, University of Wollongong, NSW 2522 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    blast furnace; hearth refractory; coke ash; calcium aluminates; alumina-carbon;

    机译:高炉;炉膛耐火材料焦炭灰铝酸钙;氧化铝碳;

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